For the 5 MHz, there are 512 sub-carriers of 15 kHz. The total band is 7.68 MHz. It is larger than the 5 MHz band!

But only 301 sub-carriers are used (Pilot, DC, data), the other ones are guard sub-carriers: 301 Sub-ca * 15 kHz = 4.515 MHz

Flexible bandwidth allocation supported by OFDM

• Still different RF filter will be required
• Frame structure always the same
• Sampling frequency is an transmitter and receiver implementation issue
• Sampling rate is multiple of 3.84 MHz ? single clock for multi-mode UE with WCDMA
• Smallest bandwidth that is supported was modified recently and needs to be updated